Propeller



M. HENDERSON PROPELLER Filed 0ctr4, 1922. 2 Sheets-Sheet 1 Oct. 13 .1925 v M HENDERSON PROPELLER Filed Oct. 4. 1922 2 Sheets-Sheet Patented Oct. 13,1925, I 1,556,791

IU D STATE PATE OFFICE",

'MARonLLUs r-rnnnnason; orwissr HoBok N, NEW JERSEY.

' v I rnorELLriR. g I

Application filed October 4, 1922. S eria1 No..592, 228.. v g Y w I akeying element coa'cting' with suitable Be it known that I, MARGELLUS HENDER mounting means provided with a co-operatson, a citizen of the United States of Amering keying element wherebyupon breakage ica, residing at West Hoboken, county of of -the-shaft,'such "keyingel'ements combine 50 Tb'aZZ whom it may concern:

Hudson, Stateof New Jersey, have-invented to retain "or longitudin ally lockthe' procertain new and useful Improvements inpeller in position, Preferably, such mount- Propellers, of which the following is a speciing means is formed with a removable mem fic ation." I 1 Q ber to facilitate installationof the pro- This invention relates to propellers. peller and subsequent removal of the pro-. "Heretofore, it has: been common practice peller. o I

tosupport'propellers of 'shipsof the sea as Further features and objects of the inwell as for aeroplanes, wholly on the pro vention' will be more fully understood from peller shaft or the engine shaft, and in the the following detaildescription and the event of breakage of the propeller-supportaccompanying drawings, in which, 60 ing shaft, the propeller is dropped and lost, Fig. 1 is a perspective view of a propeller with the serious consequences unfortunately embodying my U invention, repeated too often in the chronicles of the Fig. 2 is a detail longitudinal sectional sea and the air. v p I elevation on line 22 of Fig. '1;

An object of this invention isto provide Fig. 3 is a detail side elevation showing 65 the suitable supporting means for the prothe stern of a water craft ship and propeller whereby in the event of breakage of vided with a'propeller embodying my.inthe propeller-supporting shaft, the propeller Vention; and is securely retained and its loss safe-guarded I Fig. 4 is a sectional elevation on line against and independently of the propeller 4 4 of Fig. 3. v g 70 h ft, I Referring to Fig. 3 of the drawings, my further object of the invention is to nv l i s rated for useas i P provide retaining means for the propell r peller for a steamship or otherfwater craft to partially relieve the propeller-supporting V ssel Which maybe of any approved type.

shaft from thrusts and stresses incident to H WQVBI', i willbe understood that the 1n- 75 a the rotativ actuati by th ell r vention is applicable also to airplanes and haft, other ships of the air, turbine wheels, water A further object of the invention is to Wheels nd like devices. provide suitable mounting means for the The o nter-stern of the ship is indicated propeller whereby in the event of partial at and h d O II atll; the rupture of the propeller shaft, the shaft rudder maybe Ca ied by the rudder post y b m d hil th r ll r i b- 12, mounted at itslower end inthe shoe 13. stantially retained in normal position and prqp 0f e p is india ed a new shaft replaced for 'thefpropeller, at Q Thisadvantage is of especial merit for ships Th 'propeller'shaft '1 ex ends through while at sea in theevent of the necessity ofstuffing bOXeS hOWIl) located in the repair or replacement of the propellershaft. usual manner i en h a e f the Stern Pursliant, ja, f rm of liandfextends '3, proper distance therebevent-ion, the propeller is"provided with af X9 R locate .th? p' pe er .16 in suitablehub extension, projecting anteriorly of the relatloll 0 h 'ship,"as Wlllbe understood hub proper of the propeller, which exten- PIT h s S e he 1 is illustrated sion is grooved or otherwise provided. with 111 ge'-pr0pel1er16 maybe ofthreeblade type; the type and number of blades, as well as the formation of the blades may be varied as desired.

The hub 17 of the propeller is provided with the central opening 18 for receiving the end of the propeller shaft 15. Extending anteriorly of the hub 17 I provide the collar 19 which may be cast integrally With the hub 17 or otherwise fixedly secured thereto and provided with a shaft receiving opening 18 registering with the opening 18 of the hub 17. ,As illustrated in the drawings, the collar 19 is provided with the p p y nd .ng..grQ0va,. a in such type of collar thegroove 20,-as appears more fully hereinafter, co-operates with the suitable securing and mounting means there for to longitudinally key. and thereby re tain the propeller 16 imposition in the event Qf partial or, complete rupture of the prop le S a i 'e form of supporting and mounting H ans for the collar 19 of the propeller 16,,

the bracket, 21 formed of retapa ad member 225; 3, eevFigr R9Q -W9ly.1? 1*i d W thi a0pp7 tely x" endi g s minn larpor n p sits. w e .intr b cn, e. op i having a diameter slightly greater than .the diameter of the circular face 27, see Figs. 1 2, ofthe groove 20. Such semi-annularportions24, 25, see Fig. 3, have a width reduced more or less in dimension as compared yvith the length of the circular face 27 of the groove 20, to thereby reduce frictienal losses npon the rotation of the extension 19 incident to thedrive of the propel ler 1 6 by the .propellershaft 1'5, but in the event of breakage or partial rupture of P ZQP heft th sion 1 is retained within the opening 26 of the bracket 21.

Such bracket members 22, 23*," are clamped attheir upper angularextensions to the counter-sterny) of the ship, as by means ofboltsQ 28, rivets or the; like and similarly clamped at their lower laterally angular extending pprtio'ns29 to the stern proper 14 of the the boltsfiO or the like. If desired, thqbracket members 22, 23. may be inte rmediately clamped against I la'teral, displacement by means of the bolts 1, 31, 32, which may be located adjacent and on opposite sides of the respective circularly ex tendingportions 24, 25, I l

propeller 16; may be locked peripherally on the propeller shaft 15 by a removable key, splineor the,like,, coupling the extension or collar 19 directly to the prop ller. s a t 5- I Erom' the above, it will appear under normal actuation of; the propeller 16 by the propeller shaft 15-,- the p-ro'p'eller proper will be rotateito ,drivetheship 1O forwardly or rearwardly, as will be understood; In

such position of the propeller 16, the extension or collar 19 will idly rotate Within the opening 26 of the bracket 21. In the event of partial rupture of the propeller shaft 15, the extension or collar 19 will have a bearing relation with the curved portions 24, 25 of the bracket 21, thereby serving to partially support the weight of the propeller 16 and relieve the disabled propeller shaft of the entire weight of the propeller. In the event of complete rupture or breakage of the propeller shaft 15, the curved" portions 24:, 25 of the bracket 21 coact with the groove 20 27 of the. extension or collar 19 to longitudinally lock and thereby safeguard the propeller 16 from dropping into the'se'a. The coaction of the groove 20 and collar- 19 with itssupport, such as the semiannular portions 24, 25 affords a support for the propeller proper, 16 independently of the propeller shaft 15,,and. thereby, relieving the propeller shaft 15 of stresses and strains in the normal operation of the drive of'the' propeller 16 by the propeller shaftql5. e

When it becomes necessary or desirable to repair the propeller shaft while the ship is at sea, uponremoval of the propeller sha'ft15 from connectionwith the propeller f 16, the extension or collar. 19 retains the 95 propeller 16 substantially in normal position.

If desired, suitable lubrication 'may be provided between the bearing faces" of the A semrannular portion 24, 25 ofthe bracket 1 21 and the bearing face '27 of the collar 19;

In a similar manner, the propeller of an airship may be provided with on extension or collar similar to 1-9 and suitable bracket similar to the bracket 21 provided for mount- 105 ingand supporting the collar 19 under normal and abnormal working conditions corresponding similarly to those'liereinabove particularly described in relation to a water craft vessel Whereas I have described my invention by reference to specific formsthere'ofit will be understood that many changes and modifica tions may be .made without departing from the spirit of the invention.

I claim-: v

1. The combination with a ship having a propeller shaft, .of a propeller, removable means for fixedly securing said propeller to said propeller shaft, anextension se- 120 cured tols'aid propeller, said extension being provided with an opening for reception of the propeller shaftan'd' means carried by the ship for rotatably normally freely receiving said extension and for'retaining the 12 same in the event of breakage of the propeller shaft, said mounting means comprising a removable portion to permit said extension to be removed from said mounting means- 2. The combination with a ship having a propeller shaft, of a propeller comprising a hub and blades, removable means for fixedly securing said propeller to said propeller shaft, an extension fixedly secured to said hub and mounting means carried by said ship for rotatably normally freely receiving said extension, said extension and said mounting means coacting to lock meanother against longitudinal parting, in the 10 In testimony whereof I have signed this 1 specification this 6th day of September, 1922.

MARCELLUS HENDERSON. 

